1
/***************************************************************************
2
* Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at> *
4
* This program is free software; you can redistribute it and/or modify *
5
* it under the terms of the GNU General Public License as published by *
6
* the Free Software Foundation; either version 2 of the License, or *
7
* (at your option) any later version. *
9
* This program is distributed in the hope that it will be useful, *
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12
* GNU General Public License for more details. *
14
* You should have received a copy of the GNU General Public License *
15
* along with this program; if not, write to the *
16
* Free Software Foundation, Inc., *
17
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
18
***************************************************************************/
20
#ifndef DOLPHINVIEWAUTOSCROLLER_H
21
#define DOLPHINVIEWAUTOSCROLLER_H
26
class QAbstractItemView;
31
* @brief Assures that an autoscrolling is done for item views.
33
* This is a workaround as QAbstractItemView::setAutoScroll() is not usable
34
* when selecting items (see Qt issue #214542).
36
class DolphinViewAutoScroller : public QObject
41
DolphinViewAutoScroller(QAbstractItemView* parent);
42
virtual ~DolphinViewAutoScroller();
43
bool isActive() const;
46
* Must be invoked by the parent item view, when QAbstractItemView::currentChanged()
47
* has been called. Assures that the current item stays visible when it has been
48
* changed by the keyboard.
50
void handleCurrentIndexChange(const QModelIndex& current, const QModelIndex& previous);
53
virtual bool eventFilter(QObject* watched, QEvent* event);
56
void scrollViewport();
59
void triggerAutoScroll();
60
void stopAutoScroll();
63
* Calculates the scroll increment dependent from
64
* the cursor position \a cursorPos and the range 0 - \a rangeSize - 1.
66
int calculateScrollIncrement(int cursorPos, int rangeSize) const;
69
bool m_rubberBandSelection;
71
bool m_initializedTimestamp;
72
int m_horizontalScrollInc;
73
int m_verticalScrollInc;
74
QAbstractItemView* m_itemView;